GM Service Manual Online
For 1990-2009 cars only

Problem

Action

A partially open air inlet valve.

    â€¢ The air inlet valve should close properly in all modes except A/C recirculation mode.
    â€¢ Make repairs as necessary.

The side door seals are damaged or missing.

    â€¢ Inspect all of the door seals.
    â€¢ Repair or replace faulty seals as necessary.